added rotation when generating lexicon

[minhphd]

• added rotation and generated new lexicon file
• created a lexicon to csv converter script for reading and debugging lexicon file
• tested new lexicon file with test1.py

[nalmadi]

Nice work @minhphd, thanks for making a contribution to this project. Here are a few comments that I have:

It seems like you are taking the average congruence of all rotations, which makes most values around 0.5. Can you change that to the maximum value, as suggested by the methods section of this paper (2nd paragraph):

https://journals.sagepub.com/doi/pdf/10.2466/pms.1968.26.2.659?casa_token=9pbqnl1kFmkAAAAA:T6g-w7b6tVKhN4n40PAAOJKH8tG32Oa7kjQUfGyWxwjd23o30gpaHvponoFpruwQUB79VuSRzuCs

In the same paper you can find a table of letter congruence, it would be great if you can compare the values in the tables to your generated values. They don't have to match perfectly, but they should be correlated.

I will accept the PR with the updates above. Feel free to send me a nudge if you want me to take a look at this. Thanks again!